Ronco builds its 32-gallon marine blank two ways, and the B353 is the heavyweight: 105 lb of molded polyethylene, more than three pounds of tank per gallon of capacity. That ratio - the highest in this size class - buys wall section for the installations that destroy ordinary tanks: hulls that pound, compartments with point contact, workboats and long-haul cruisers where the water system must simply never be the thing that fails. If your last tank cracked, this is the answer to why.
Like all of Ronco's bare marine moldings it ships without fittings, and the ports go where your drawing says. Print the plan below, mark fill, vent, pickup, and sender with the fitting planner on this page, and each fitting is spin-welded or thread-installed to those marks in Tustin, California - craft the plant has practiced since 1974. Specified fresh, the shell is FDA-compliant and safe for potable water; specified for waste, the same dual-role blank becomes an armored gray or black holding tank.
Plan around both numbers: 105 lb of tank at delivery - worth a pass through the freight cost estimator - and about 267 lb of water once full. The lighter 32-gallon build and every other shape are in the boat tank category, with the maker's full line on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B353 dimensional drawing - print it to plan your install and mark exactly where you want fittings located; Ronco installs spin-weld or threaded fittings to your marked spec.
